Question

There are ______ basic colours of light depending upon their  wavelengths.​

Answer 1

Answer:

When all the waves are seen together, they make white light. White light is actually made of all of the colours of the rainbow because it contains all wavelengths, and it is described as polychromatic light. Light from a torch or the Sun is a good example of this.

Explanation:

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Answer 2

7 basic colours
Violet
Indigo
Blue
Green
Yellow
Orange
Red